FBC, Full biochemistry panel, ESR, TFT, Iron studies. Epstein-Barr ViRU Antibody Profile, Lymphocyte Subsets (CD4/CD8)*, CRP, Vitamin D (25 OH)
Additional test may include ANA (antinuclear antibodies) to detect autoimmune disorders, Lyme disease test—when suspected and endemic in the patient’s geographical area, Rheumatoid factor—to determine whether rheumatoid arthritis may be present
HIV antibody test—to check for HIV infection
Cortisol test—when low cortisol concentrations and/or decreased adrenal gland function are suspected